摘要
设计了具有45°和135°方向的二维棋盘形滤波器对.通过棋盘形滤波器对,输入图像被分解为两幅子图像,且二维余弦调制滤波器组被分别应用到每幅子图像.这种结构等效于一个冗余比为2的新的方向滤波器组.新的方向滤波器组具有良好的方向和频率选择性.将双重局部维纳滤波算法和新的方向滤波器组相结合,提出了一种新的图像去噪算法.实验结果表明:对于含有丰富纹理的图像,本文提出的算法获得了明显的去噪性能改善.
The checkerboard-shape filter pair with directions 45° and 135° which can decompose the input image into two images containing different directional information of the original image are designed. A 2-D separable CMFB is applied to the two images torealize subband decompositions. This cascading structure corresponds to a new directional filter bank of redundant ratios of 2. The new DFB can provide good directional and frequency selectivity. The new DFB and the doubly local Wiener filtering algorithm are combined to develop a new image denoising algorithm. The experimental results show that the proposed algorithm achieves satisfactory performance improvement for images with abundant textures.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2010年第2期380-384,共5页
Acta Photonica Sinica
